Test Oxygen Sensor Relay
Exhaust System
A diagnostic check of the relay that powers oxygen sensors, which measure exhaust oxygen to help the engine run efficiently. A failed relay disables the sensors and prevents the engine from optimizing fuel delivery and emissions control.
Estimated Cost
$50–$130🔒
Parts + labor, based on the parts this service typically requires. Not specific to your vehicle or region — this spans all vehicles, all regions, and all part grades, so treat it as a rough ballpark rather than a quote.